Single person game developers who don't want to hire an artist?
Says you. There is reason vim is not "dead" and it's not just cause "old people" still use it. Also, there are plenty of IDEs besides VS.
Finally, "vast majority" doesn't matter for shit with open source. One developer with an itch is enough. If there's a handful of others with same, all the better.
Developing videogames is not one of these reasons.
> there are plenty of IDEs besides VS.
How many of these IDEs are supported by mainstream 3D engines, or current-gen console SDKs?
Similarly, IdeaVim is shown as option in first run dialog of IntelliJ-based editors.
Similarly with Emacs key map in most older IDEs.